/* =====================================================
   华宇镁业 - Apple Design System
   设计原则：极简、留白、产品为中心
===================================================== */

/* ===================== */
/* CSS 变量 */
/* ===================== */
:root {
    /* 苹果配色 */
    --apple-black: #1D1D1F;
    --apple-gray: #86868B;
    --apple-gray-light: #F5F5F7;
    --apple-white: #FFFFFF;

    /* 品牌色 */
    --brand-blue: #164d80;
    --brand-blue-hover: #103855;
    --brand-blue-soft: rgba(22, 77, 128, 0.1);

    /* 文化卡片渐变 */
    --gradient-dark: linear-gradient(145deg, #1D1D1F 0%, #2D2D2F 50%, #1D1D1F 100%);
    --gradient-blue: linear-gradient(145deg, #3A7CA5 0%, #4B97C6 50%, #5BA3D0 100%);
    --gradient-green: linear-gradient(145deg, #2D4A3E 0%, #3D5A4E 50%, #2D4A3E 100%);

    /* 圆角 */
    --radius-sm: 12px;
    --radius-md: 24px;
    --radius-lg: 32px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 8px 40px rgba(0, 0, 0, 0.1);
    --shadow-float: 0 20px 60px rgba(0, 0, 0, 0.15);

    /* 动画 */
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --duration: 0.4s;

    /* 字体 */
    --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===================== */
/* 基础重置 */
/* ===================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.6;
    color: var(--apple-black);
    background: var(--apple-white);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===================== */
/* 通用按钮 */
/* ===================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-size: 17px;
    font-weight: 500;
    color: var(--apple-white);
    background: var(--brand-blue);
    border-radius: var(--radius-full);
    transition: all var(--duration) var(--ease-out);
}

.btn-primary:hover {
    background: var(--brand-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(75, 151, 198, 0.35);
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 17px;
    font-weight: 500;
    color: var(--brand-blue);
    transition: all var(--duration) var(--ease-out);
}

.btn-text:hover {
    color: var(--brand-blue-hover);
}

.btn-text .arrow {
    transition: transform var(--duration) var(--ease-out);
}

.btn-text:hover .arrow {
    transform: translateX(4px);
}

/* ===================== */
/* 导航栏 */
/* ===================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all var(--duration) var(--ease-out);
}

.header.scrolled {
    padding: 12px 0;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo img {
    height: 44px;
    width: auto;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 14px;
    font-weight: 400;
    color: var(--apple-black);
    opacity: 0.8;
    transition: opacity var(--duration) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
}

.header-cta {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--apple-white);
    background: var(--brand-blue);
    border-radius: var(--radius-full);
    transition: all var(--duration) var(--ease-out);
}

.header-cta:hover {
    background: var(--brand-blue-hover);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
}

.menu-toggle span {
    width: 20px;
    height: 1.5px;
    background: var(--apple-black);
    transition: all var(--duration) var(--ease-out);
}

/* ===================== */
/* Hero 首屏 */
/* ===================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    background: var(--apple-white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140%;
    height: 140%;
    background:
        radial-gradient(ellipse 50% 50% at 20% 30%, rgba(75, 151, 198, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 40% 40% at 80% 20%, rgba(67, 142, 85, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse 45% 45% at 60% 80%, rgba(75, 151, 198, 0.12) 0%, transparent 50%);
    animation: gradientFloat 20s ease-in-out infinite;
}

@keyframes gradientFloat {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
    }
    33% {
        transform: translate(-48%, -52%) scale(1.02) rotate(1deg);
    }
    66% {
        transform: translate(-52%, -48%) scale(0.98) rotate(-1deg);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(44px, 7vw, 88px);
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -2px;
    color: var(--apple-black);
    margin-bottom: 24px;
}

.hero-eyebrow {
    font-size: 16px;
    letter-spacing: 1px;
    color: #596670;
    margin-bottom: 24px;
}

.hero-description {
    font-size: clamp(17px, 2vw, 21px);
    line-height: 1.8;
    color: #596670;
    margin-bottom: 22px;
}

.hero-meta {
    font-size: 16px;
    color: #596670;
    margin-bottom: 48px;
    letter-spacing: 0.5px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--apple-gray);
    border-bottom: 2px solid var(--apple-gray);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease-in-out infinite;
    opacity: 0.5;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.5; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

/* ===================== */
/* 核心优势区块 */
/* ===================== */
.advantage {
    padding: 160px 24px;
    background: var(--apple-white);
}

.advantage-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.advantage-reverse .advantage-container {
    direction: rtl;
}

.advantage-reverse .advantage-container > * {
    direction: ltr;
}

.advantage-image {
    position: relative;
}

.advantage-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    transition: transform var(--duration) var(--ease-out),
                box-shadow var(--duration) var(--ease-out);
}

.advantage:hover .advantage-image img {
    transform: translateY(-8px);
    box-shadow: var(--shadow-float);
}

.advantage-content {
    max-width: 480px;
}

.advantage-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--brand-blue);
    text-transform: uppercase;
    margin-bottom: 20px;
    padding: 8px 16px;
    background: var(--brand-blue-soft);
    border-radius: var(--radius-sm);
}

.advantage-number {
    font-size: clamp(80px, 10vw, 120px);
    font-weight: 200;
    line-height: 1;
    color: var(--brand-blue);
    margin-bottom: 16px;
    letter-spacing: -4px;
    font-family: 'Inter', var(--font-sans);
}

.advantage-number .unit {
    font-size: 0.5em;
    font-weight: 300;
    letter-spacing: 0;
    margin-left: 4px;
}

.advantage-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.advantage-desc {
    font-size: 17px;
    line-height: 1.7;
    color: var(--apple-gray);
}

/* ===================== */
/* 企业文化 */
/* ===================== */
.culture {
    padding: 160px 24px;
    background: var(--apple-white);
}

.culture-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 80px;
}

.culture-title {
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.culture-desc {
    font-size: 18px;
    line-height: 1.7;
    color: var(--apple-gray);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.culture-card {
    position: relative;
    padding: 48px 36px;
    border-radius: var(--radius-md);
    color: var(--apple-white);
    overflow: hidden;
    transition: transform var(--duration) var(--ease-out),
                box-shadow var(--duration) var(--ease-out);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-float);
}

.culture-card-dark {
    background: var(--gradient-dark);
}

.culture-card-blue {
    background: var(--gradient-blue);
}

.culture-card-green {
    background: var(--gradient-green);
}

.culture-card-title {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.culture-card-subtitle {
    font-size: 16px;
    font-weight: 500;
    opacity: 0.8;
    margin-bottom: 24px;
}

.culture-card-text {
    font-size: 15px;
    line-height: 1.7;
    opacity: 0.85;
}

/* ===================== */
/* 产品展示 */
/* ===================== */
.products {
    padding: 160px 24px;
    background: var(--apple-white);
}

.products-header {
    text-align: center;
    margin-bottom: 80px;
}

.products-title {
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    letter-spacing: -1px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    display: block;
    background: var(--apple-gray-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform var(--duration) var(--ease-out),
                box-shadow var(--duration) var(--ease-out);
}

.product-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-medium);
}

.product-card-image {
    padding: 0;
    display: block;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration) var(--ease-out);
}

.product-card:hover .product-card-image img {
    transform: scale(1.08);
}

.product-card-info {
    padding: 32px;
}

.product-card-symbol {
    display: inline-block;
    font-size: 24px;
    font-weight: 600;
    color: var(--brand-blue);
    margin-bottom: 12px;
    font-family: 'Inter', var(--font-sans);
}

.product-card-info h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.product-card-info p {
    font-size: 15px;
    color: var(--apple-gray);
}

.product-card-info .arrow {
    transition: transform var(--duration) var(--ease-out);
    display: inline-block;
}

.product-card:hover .arrow {
    transform: translateX(4px);
}

.products-cta {
    text-align: center;
    margin-top: 60px;
}

/* ===================== */
/* 资质认证 - DNV 区块 */
/* ===================== */
.cert-dnv {
    padding: 200px 24px;
    background: var(--apple-black);
    text-align: center;
}

.cert-dnv-content {
    max-width: 900px;
    margin: 0 auto;
}

.cert-dnv-label {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    color: var(--brand-blue);
    text-transform: uppercase;
    margin-bottom: 24px;
}

.cert-dnv-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 600;
    line-height: 1.1;
    color: var(--apple-white);
    margin-bottom: 32px;
    letter-spacing: -2px;
}

.cert-dnv-desc {
    font-size: 21px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
}

/* ===================== */
/* 资质认证 - 年份区块 */
/* ===================== */
.cert-years {
    padding: 200px 24px;
    background: var(--apple-white);
    text-align: center;
}

.cert-years-content {
    max-width: 800px;
    margin: 0 auto;
}

.cert-years-number {
    font-size: clamp(160px, 25vw, 280px);
    font-weight: 200;
    line-height: 0.85;
    color: var(--brand-blue);
    letter-spacing: -12px;
    font-family: 'Inter', var(--font-sans);
    margin-bottom: 24px;
}

.cert-years-text {
    font-size: 24px;
    font-weight: 500;
    color: var(--apple-gray);
}

/* ===================== */
/* 资质认证 - 企业荣誉 */
/* ===================== */
.cert-honors-section {
    padding: 160px 24px;
    background: var(--apple-gray-light);
}

.cert-honors-content {
    max-width: 1200px;
    margin: 0 auto;
}

.cert-honors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.cert-honor-card {
    background: var(--apple-white);
    border-radius: var(--radius-md);
    padding: 48px 32px;
    text-align: center;
    transition: all var(--duration) var(--ease-out);
}

.cert-honor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.cert-honor-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-black);
    line-height: 1.4;
}

/* ===================== */
/* 资质认证 - 行业协会 */
/* ===================== */
.cert-assoc-section {
    padding: 160px 24px;
    background: var(--apple-white);
    text-align: center;
}

.cert-assoc-content {
    max-width: 900px;
    margin: 0 auto;
}

.cert-assoc-label {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    color: var(--apple-gray);
    text-transform: uppercase;
    margin-bottom: 20px;
}

.cert-assoc-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 32px;
    letter-spacing: -1px;
}

.cert-assoc-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.cert-assoc-item {
    font-size: 21px;
    font-weight: 500;
    color: var(--brand-blue);
}

.cert-assoc-divider {
    font-size: 24px;
    color: var(--apple-gray);
}

/* ===================== */
/* 资质认证 - 国际认证 */
/* ===================== */
.cert-intl-section {
    padding: 120px 24px;
    background: var(--apple-gray-light);
    text-align: center;
}

.cert-intl-content {
    max-width: 1000px;
    margin: 0 auto;
}

.cert-intl-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

.cert-intl-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cert-intl-name {
    font-size: 36px;
    font-weight: 600;
    color: var(--apple-black);
    letter-spacing: 2px;
    font-family: 'Inter', var(--font-sans);
}

.cert-intl-desc {
    font-size: 15px;
    color: var(--apple-gray);
}

/* ===================== */
/* 联系我们 */
/* ===================== */
.contact {
    padding: 160px 24px;
    background: var(--apple-white);
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.contact-desc {
    font-size: 18px;
    color: var(--apple-gray);
    margin-bottom: 40px;
}

.contact-phone {
    font-size: 17px;
    color: var(--apple-gray);
    margin-top: 24px;
}

/* ===================== */
/* 页脚 */
/* ===================== */
.footer {
    padding: 24px;
    background: var(--apple-white);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand img {
    height: 28px;
    width: auto;
}

.footer-brand span {
    font-size: 15px;
    font-weight: 500;
    color: var(--apple-black);
}

.footer-nav {
    display: flex;
    gap: 32px;
}

.footer-nav a {
    font-size: 14px;
    color: var(--apple-gray);
    transition: color var(--duration) var(--ease-out);
}

.footer-nav a:hover {
    color: var(--apple-black);
}

.footer-copy {
    font-size: 13px;
    color: var(--apple-gray);
}

/* ===================== */
/* 动画 - 滚动进入 */
/* ===================== */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out),
                transform 0.8s var(--ease-out);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* 视差效果 */
.advantage-image {
    transition: transform 0.1s linear;
}

/* ===================== */
/* 响应式设计 */
/* ===================== */
@media (max-width: 1024px) {

    .advantage-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .advantage-reverse .advantage-container {
        direction: ltr;
    }

    .advantage-content {
        max-width: 100%;
        text-align: center;
    }

    .culture-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .cert-honors-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .cert-intl-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav,
    .header-cta {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding: 120px 24px 80px;
        min-height: auto;
    }

    .hero-title {
        font-size: clamp(38px, 9.8vw, 48px);
        letter-spacing: -1.5px;
    }

    .hero-meta {
        font-size: 14px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 16px;
    }

    .advantage {
        padding: 100px 24px;
    }

    .advantage-number {
        font-size: 72px;
    }

    .culture,
    .products,
    .certifications,
    .contact {
        padding: 100px 24px;
    }

    .culture-title,
    .products-title,
    .contact-title {
        font-size: 32px;
    }

    .cert-dnv,
    .cert-years {
        padding: 120px 24px;
    }

    .cert-dnv-title {
        font-size: 40px;
        letter-spacing: -1px;
    }

    .cert-dnv-desc {
        font-size: 17px;
    }

    .cert-years-number {
        font-size: 120px;
        letter-spacing: -6px;
    }

    .cert-years-text {
        font-size: 18px;
    }

    .cert-honors-section,
    .cert-assoc-section {
        padding: 100px 24px;
    }

    .cert-honors-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .cert-honor-card {
        padding: 32px 24px;
    }

    .cert-honor-title {
        font-size: 18px;
    }

    .cert-assoc-title {
        font-size: 28px;
    }

    .cert-assoc-list {
        flex-direction: column;
        gap: 12px;
    }

    .cert-assoc-item {
        font-size: 17px;
    }

    .cert-assoc-divider {
        display: none;
    }

    .cert-intl-section {
        padding: 80px 24px;
    }

    .cert-intl-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .cert-intl-name {
        font-size: 24px;
    }

    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .scroll-hint {
        display: none;
    }
}

/* ===================== */
/* 移动端菜单 */
/* ===================== */
.nav-mobile {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.nav-mobile.active {
    display: flex;
}

.nav-mobile a {
    font-size: 24px;
    font-weight: 500;
    color: var(--apple-black);
}

.menu-toggle.active span:first-child {
    transform: rotate(45deg) translateY(5px);
}

.menu-toggle.active span:last-child {
    transform: rotate(-45deg) translateY(-5px);
}

/* ===================== */
/* 平滑滚动优化 */
/* ===================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* =====================================================
   子页面样式
===================================================== */

/* ===================== */
/* 页面 Hero */
/* ===================== */
.page-hero {
    padding: 180px 24px 100px;
    background: var(--apple-white);
    text-align: center;
}

.page-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-hero-title {
    font-size: clamp(56px, 10vw, 96px);
    font-weight: 600;
    color: var(--apple-black);
    letter-spacing: -3px;
    margin-bottom: 16px;
}

.page-hero-desc {
    font-size: 21px;
    color: var(--apple-gray);
}

/* ===================== */
/* 产品页 - 导航 */
/* ===================== */
.product-nav {
    position: sticky;
    top: 76px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0 24px;
}

.product-nav-inner {
    display: flex;
    justify-content: center;
    gap: 8px;
    max-width: 800px;
    margin: 0 auto;
    padding: 16px 0;
    overflow-x: auto;
}

.product-nav-item {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--apple-gray);
    background: transparent;
    border-radius: var(--radius-full);
    white-space: nowrap;
    transition: all var(--duration) var(--ease-out);
}

.product-nav-item:hover {
    color: var(--apple-black);
    background: var(--apple-gray-light);
}

.product-nav-item.active {
    color: var(--apple-white);
    background: var(--apple-black);
}

/* ===================== */
/* 产品页 - 产品区块 */
/* ===================== */
.product-section {
    padding: 120px 24px;
    background: var(--apple-white);
}

.product-section-alt {
    background: var(--apple-gray-light);
}

.product-section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.product-symbol {
    display: inline-block;
    font-size: 48px;
    font-weight: 600;
    color: var(--brand-blue);
    margin-bottom: 20px;
    font-family: 'Inter', var(--font-sans);
}

.product-section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.product-section-desc {
    font-size: 17px;
    color: var(--apple-gray);
    line-height: 1.7;
    margin-bottom: 24px;
}

.product-tags {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.product-tag {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--brand-blue);
    background: var(--brand-blue-soft);
    border-radius: var(--radius-sm);
}

.product-section-image {
    max-width: 800px;
    margin: 0 auto 60px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.product-section-image img {
    width: 100%;
    height: auto;
}

.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.product-list-item {
    display: block;
    padding: 32px;
    background: var(--apple-white);
    border-radius: var(--radius-md);
    transition: all var(--duration) var(--ease-out);
}

.product-section-alt .product-list-item {
    background: var(--apple-white);
}

.product-list-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.product-list-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 12px;
}

.product-list-item p {
    font-size: 15px;
    color: var(--apple-gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-spec {
    font-size: 14px;
    font-weight: 500;
    color: var(--brand-blue);
}

/* ===================== */
/* 产品页 - 设备网格 */
/* ===================== */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.equipment-card {
    background: var(--apple-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--duration) var(--ease-out);
}

.equipment-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.equipment-image {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.equipment-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.equipment-info {
    padding: 24px;
}

.equipment-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.equipment-info p {
    font-size: 14px;
    color: var(--apple-gray);
    margin-bottom: 12px;
}

.equipment-spec {
    font-size: 13px;
    font-weight: 500;
    color: var(--brand-blue);
}

/* ===================== */
/* 页面 CTA */
/* ===================== */
.page-cta {
    padding: 160px 24px;
    background: var(--apple-black);
    text-align: center;
}

.page-cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.page-cta-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-white);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.page-cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.page-cta-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
}

.page-cta .btn-primary {
    background: var(--apple-white);
    color: var(--apple-black);
}

.page-cta .btn-primary:hover {
    background: var(--apple-gray-light);
}

.page-cta .btn-text {
    color: var(--apple-white);
}

/* ===================== */
/* 关于页 - 简介 */
/* ===================== */
.about-intro {
    padding: 120px 24px;
    background: var(--apple-white);
}

.about-intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-intro-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 32px;
}

.about-intro-text {
    font-size: 17px;
    color: var(--apple-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* ===================== */
/* 关于页 - 数据 */
/* ===================== */
.about-stats {
    padding: 120px 24px;
    background: var(--apple-gray-light);
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.about-stat-number {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 200;
    color: var(--brand-blue);
    line-height: 1;
    font-family: 'Inter', var(--font-sans);
}

.about-stat-unit {
    font-size: 24px;
    font-weight: 400;
    color: var(--brand-blue);
}

.about-stat-label {
    display: block;
    font-size: 15px;
    color: var(--apple-gray);
    margin-top: 12px;
}

/* ===================== */
/* 关于页 - 优势 */
/* ===================== */
.about-advantages {
    padding: 120px 24px;
    background: var(--apple-white);
}

.about-advantages-header {
    text-align: center;
    margin-bottom: 60px;
}

.about-advantages-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    letter-spacing: -1px;
}

.about-advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.about-advantage-card {
    padding: 40px;
    background: var(--apple-gray-light);
    border-radius: var(--radius-md);
}

.about-advantage-card h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 16px;
}

.about-advantage-card p {
    font-size: 15px;
    color: var(--apple-gray);
    line-height: 1.7;
}

/* ===================== */
/* 关于页 - 行业 */
/* ===================== */
.about-industries {
    padding: 120px 24px;
    background: var(--apple-gray-light);
}

.about-industries-header {
    text-align: center;
    margin-bottom: 60px;
}

.about-industries-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.about-industries-desc {
    font-size: 17px;
    color: var(--apple-gray);
}

.about-industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.about-industry {
    padding: 24px;
    font-size: 17px;
    font-weight: 500;
    color: var(--apple-black);
    background: var(--apple-white);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all var(--duration) var(--ease-out);
}

.about-industry:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

/* ===================== */
/* 联系页 - 信息卡片 */
/* ===================== */
.contact-info-section {
    padding: 80px 24px;
    background: var(--apple-white);
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info-card {
    padding: 32px;
    background: var(--apple-gray-light);
    border-radius: var(--radius-md);
    text-align: center;
}

.contact-info-primary {
    background: var(--brand-blue);
}

.contact-info-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--apple-gray);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-info-primary .contact-info-label {
    color: rgba(255, 255, 255, 0.7);
}

.contact-info-value {
    display: block;
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-black);
}

.contact-info-primary .contact-info-value {
    color: var(--apple-white);
    font-size: 24px;
}

/* ===================== */
/* 联系页 - 营业时间 */
/* ===================== */
.contact-hours {
    padding: 80px 24px;
    background: var(--apple-gray-light);
}

.contact-hours-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-hours-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 32px;
}

.contact-hours-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.contact-hours-item {
    text-align: center;
}

.contact-hours-day {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.contact-hours-time {
    font-size: 15px;
    color: var(--apple-gray);
}

/* ===================== */
/* 联系页 - 表单 */
/* ===================== */
.contact-form-section {
    padding: 80px 24px;
    background: var(--apple-white);
}

.contact-form-container {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form-header {
    text-align: center;
    margin-bottom: 40px;
}

.contact-form-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 12px;
}

.contact-form-desc {
    font-size: 17px;
    color: var(--apple-gray);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--apple-black);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 16px;
    font-size: 16px;
    font-family: inherit;
    color: var(--apple-black);
    background: var(--apple-gray-light);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    transition: all var(--duration) var(--ease-out);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brand-blue);
    background: var(--apple-white);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-full {
    width: 100%;
}

/* ===================== */
/* 联系页 - 来访指南 */
/* ===================== */
.contact-location {
    padding: 120px 24px;
    background: var(--apple-gray-light);
}

.contact-location-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-location-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 12px;
}

.contact-location-desc {
    font-size: 17px;
    color: var(--apple-gray);
    margin-bottom: 40px;
}

.contact-location-info {
    padding: 40px;
    background: var(--apple-white);
    border-radius: var(--radius-md);
}

.contact-location-info p {
    font-size: 17px;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.contact-location-directions {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--apple-gray-light);
}

.contact-location-directions p {
    font-size: 15px;
    color: var(--apple-gray);
    margin-bottom: 8px;
}

/* ===================== */
/* 动态页 - 朋友圈风格 */
/* ===================== */
.news-feed {
    padding: 60px 24px 120px;
    background: var(--apple-gray-light);
}

.news-feed-container {
    max-width: 680px;
    margin: 0 auto;
}

.news-item {
    background: var(--apple-white);
    border-radius: var(--radius-md);
    padding: 32px;
    margin-bottom: 24px;
    transition: all var(--duration) var(--ease-out);
}

.news-item:hover {
    box-shadow: var(--shadow-medium);
}

.news-item-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.news-item-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--apple-gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-item-avatar img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.news-item-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.news-item-author {
    font-size: 16px;
    font-weight: 600;
    color: var(--apple-black);
}

.news-item-date {
    font-size: 13px;
    color: var(--apple-gray);
}

.news-item-content {
    margin-bottom: 20px;
}

.news-item-text {
    font-size: 16px;
    color: var(--apple-black);
    line-height: 1.7;
    margin-bottom: 16px;
}

.news-item-images {
    display: grid;
    gap: 8px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.news-item-images-single {
    grid-template-columns: 1fr;
}

.news-item-images-grid {
    grid-template-columns: 1fr 1fr;
}

.news-item-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--radius-sm);
}

.news-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration) var(--ease-out);
}

.news-item-image:hover img {
    transform: scale(1.05);
}

.news-item-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.news-tag {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--brand-blue);
    background: var(--brand-blue-soft);
    border-radius: var(--radius-full);
}

/* ===================== */
/* 子页面响应式 */
/* ===================== */
@media (max-width: 1024px) {
    .equipment-grid {
        grid-template-columns: 1fr;
    }

    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-advantages-grid {
        grid-template-columns: 1fr;
    }

    .about-industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .page-hero {
        padding: 140px 24px 60px;
    }

    .page-hero-title {
        font-size: 48px;
        letter-spacing: -2px;
    }

    .product-nav {
        top: 60px;
    }

    .product-section {
        padding: 80px 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .about-stat-number {
        font-size: 48px;
    }

    .about-industries-grid {
        grid-template-columns: 1fr;
    }

    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    .contact-hours-grid {
        flex-direction: column;
        gap: 24px;
    }

    .page-cta {
        padding: 100px 24px;
    }

    .page-cta-buttons {
        flex-direction: column;
        gap: 16px;
    }

    .news-item {
        padding: 24px;
    }

    .news-item-images-grid {
        grid-template-columns: 1fr;
    }
}

/* =====================================================
   V2 新增功能样式
===================================================== */

/* ===================== */
/* 视频展示区 */
/* ===================== */
.video-section {
    padding: 160px 24px;
    background: var(--apple-black);
}

.video-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 80px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.video-text {
    color: var(--apple-white);
}

.video-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 600;
    color: var(--apple-white);
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.video-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 48px;
}

.video-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.video-list-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration) var(--ease-out);
}

.video-list-item:hover,
.video-list-item.active {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--brand-blue);
}

.video-list-icon {
    width: 48px;
    height: 48px;
    background: var(--brand-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.video-list-icon svg {
    width: 20px;
    height: 20px;
    color: var(--apple-white);
    margin-left: 3px;
}

.video-list-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.video-list-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--apple-white);
}

.video-list-duration {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.video-player {
    position: relative;
}

.video-player-inner {
    position: relative;
    aspect-ratio: 16/10;
    background: linear-gradient(145deg, #2D2D2F 0%, #1D1D1F 100%);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.video-player-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.video-play-btn {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration) var(--ease-out);
}

.video-player:hover .video-play-btn {
    background: var(--brand-blue);
    transform: scale(1.1);
}

.video-play-btn svg {
    width: 40px;
    height: 40px;
    color: var(--apple-white);
    margin-left: 6px;
}

.video-player-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.video-player-tag {
    display: inline-block;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--apple-white);
    background: var(--brand-blue);
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.video-player-caption {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.9);
}

/* ===================== */
/* 发展历程时间线 */
/* ===================== */
.timeline-section {
    padding: 160px 24px;
    background: var(--apple-white);
    overflow: hidden;
}

.timeline-header {
    text-align: center;
    margin-bottom: 80px;
}

.timeline-title {
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.timeline-desc {
    font-size: 18px;
    color: var(--apple-gray);
}

.timeline-container {
    max-width: 1400px;
    margin: 0 auto;
    overflow-x: auto;
    padding-bottom: 40px;
    scrollbar-width: thin;
    scrollbar-color: var(--brand-blue) var(--apple-gray-light);
}

.timeline-container::-webkit-scrollbar {
    height: 6px;
}

.timeline-container::-webkit-scrollbar-track {
    background: var(--apple-gray-light);
    border-radius: 3px;
}

.timeline-container::-webkit-scrollbar-thumb {
    background: var(--brand-blue);
    border-radius: 3px;
}

.timeline-track {
    display: flex;
    gap: 0;
    position: relative;
    padding: 60px 0;
    min-width: max-content;
}

.timeline-track::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--apple-gray-light);
    transform: translateY(-50%);
}

.timeline-item {
    flex: 0 0 280px;
    position: relative;
    padding: 0 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    background: var(--apple-white);
    border: 3px solid var(--brand-blue);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    transition: all var(--duration) var(--ease-out);
}

.timeline-item:hover::before {
    background: var(--brand-blue);
    transform: translate(-50%, -50%) scale(1.3);
}

.timeline-year {
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 32px;
    font-weight: 600;
    color: var(--brand-blue);
    font-family: 'Inter', var(--font-sans);
}

.timeline-content {
    position: absolute;
    top: calc(50% + 40px);
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    text-align: center;
    padding: 24px;
    background: var(--apple-gray-light);
    border-radius: var(--radius-md);
    transition: all var(--duration) var(--ease-out);
}

.timeline-item:hover .timeline-content {
    background: var(--apple-white);
    box-shadow: var(--shadow-medium);
    transform: translateX(-50%) translateY(-4px);
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--apple-gray);
    line-height: 1.6;
}

/* ===================== */
/* 产品选型工具 */
/* ===================== */
.selector-section {
    padding: 80px 24px;
    background: var(--apple-gray-light);
}

.selector-container {
    max-width: 800px;
    margin: 0 auto;
}

.selector-header {
    text-align: center;
    margin-bottom: 48px;
}

.selector-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 12px;
}

.selector-desc {
    font-size: 17px;
    color: var(--apple-gray);
}

.selector-form {
    background: var(--apple-white);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-soft);
}

.selector-step {
    display: none;
}

.selector-step.active {
    display: block;
    animation: fadeIn 0.4s var(--ease-out);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.selector-question {
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-black);
    text-align: center;
    margin-bottom: 32px;
}

.selector-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.selector-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: var(--apple-gray-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration) var(--ease-out);
}

.selector-option:hover {
    border-color: var(--brand-blue);
    background: var(--brand-blue-soft);
}

.selector-option-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.selector-option-icon svg {
    width: 32px;
    height: 32px;
    color: var(--brand-blue);
}

.selector-option-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--apple-black);
}

.selector-back {
    display: block;
    margin: 32px auto 0;
    padding: 12px 24px;
    font-size: 14px;
    color: var(--apple-gray);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--duration) var(--ease-out);
}

.selector-back:hover {
    color: var(--apple-black);
}

.selector-result {
    text-align: center;
    padding: 32px 0;
}

.selector-result-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: var(--brand-blue-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.selector-result-icon svg {
    width: 32px;
    height: 32px;
    color: var(--brand-blue);
}

.selector-result-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 8px;
}

.selector-result-subtitle {
    font-size: 16px;
    color: var(--apple-gray);
    margin-bottom: 24px;
}

.selector-result-recommend {
    display: inline-block;
    padding: 16px 32px;
    background: var(--brand-blue);
    color: var(--apple-white);
    font-size: 17px;
    font-weight: 500;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--duration) var(--ease-out);
}

.selector-result-recommend:hover {
    background: var(--brand-blue-hover);
    transform: translateY(-2px);
}

.selector-restart {
    display: block;
    margin: 24px auto 0;
    padding: 12px 24px;
    font-size: 14px;
    color: var(--brand-blue);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: opacity var(--duration) var(--ease-out);
}

.selector-restart:hover {
    opacity: 0.7;
}

/* ===================== */
/* 技术资源页 */
/* ===================== */
.resource-nav {
    position: sticky;
    top: 76px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0 24px;
}

.resource-nav-inner {
    display: flex;
    justify-content: center;
    gap: 8px;
    max-width: 800px;
    margin: 0 auto;
    padding: 16px 0;
    overflow-x: auto;
}

.resource-nav-item {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--apple-gray);
    background: transparent;
    border-radius: var(--radius-full);
    white-space: nowrap;
    transition: all var(--duration) var(--ease-out);
}

.resource-nav-item:hover {
    color: var(--apple-black);
    background: var(--apple-gray-light);
}

.resource-nav-item.active {
    color: var(--apple-white);
    background: var(--apple-black);
}

.resource-section {
    padding: 100px 24px;
    background: var(--apple-white);
}

.resource-section-alt {
    background: var(--apple-gray-light);
}

.resource-section-header {
    text-align: center;
    margin-bottom: 60px;
}

.resource-section-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 12px;
}

.resource-section-desc {
    font-size: 17px;
    color: var(--apple-gray);
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.resource-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--apple-white);
    border-radius: var(--radius-md);
    transition: all var(--duration) var(--ease-out);
}

.resource-section-alt .resource-card {
    background: var(--apple-white);
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.resource-card-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--brand-blue-soft);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.resource-card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--brand-blue);
}

.resource-card-icon-cad {
    background: rgba(67, 142, 85, 0.1);
}

.resource-card-icon-cad svg {
    color: #438E55;
}

.resource-card-content {
    flex: 1;
    min-width: 0;
}

.resource-card-content h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--apple-black);
    margin-bottom: 6px;
}

.resource-card-content p {
    font-size: 14px;
    color: var(--apple-gray);
    line-height: 1.5;
    margin-bottom: 8px;
}

.resource-card-meta {
    display: flex;
    gap: 12px;
}

.resource-file-type {
    font-size: 12px;
    font-weight: 600;
    color: var(--brand-blue);
    padding: 4px 8px;
    background: var(--brand-blue-soft);
    border-radius: 4px;
}

.resource-file-size {
    font-size: 12px;
    color: var(--apple-gray);
}

.resource-download {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--apple-gray-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration) var(--ease-out);
}

.resource-download:hover {
    background: var(--brand-blue);
}

.resource-download svg {
    width: 20px;
    height: 20px;
    color: var(--apple-gray);
    transition: color var(--duration) var(--ease-out);
}

.resource-download:hover svg {
    color: var(--apple-white);
}

.resource-contact {
    padding: 160px 24px;
    background: var(--apple-black);
    text-align: center;
}

.resource-contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.resource-contact-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 600;
    color: var(--apple-white);
    margin-bottom: 16px;
}

.resource-contact-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 40px;
}

/* ===================== */
/* V2 响应式设计 */
/* ===================== */
@media (max-width: 1024px) {
    .video-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .video-text {
        text-align: center;
    }

    .video-list {
        max-width: 400px;
        margin: 0 auto;
    }

    .timeline-item {
        flex: 0 0 240px;
        padding: 0 30px;
    }

    .timeline-content {
        width: 180px;
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .video-section {
        padding: 100px 24px;
    }

    .video-content {
        gap: 32px;
    }

    .video-desc {
        margin-bottom: 32px;
    }

    .video-list-item {
        padding: 16px 20px;
    }

    .video-list-icon {
        width: 40px;
        height: 40px;
    }

    .video-list-icon svg {
        width: 16px;
        height: 16px;
    }

    .video-play-btn {
        width: 70px;
        height: 70px;
    }

    .video-play-btn svg {
        width: 28px;
        height: 28px;
    }

    .video-player-info {
        padding: 24px;
    }

    .selector-section {
        padding: 60px 24px;
    }

    .selector-form {
        padding: 32px 24px;
    }

    .selector-options {
        grid-template-columns: 1fr;
    }

    .timeline-section {
        padding: 100px 24px;
    }

    .timeline-year {
        font-size: 24px;
        top: -40px;
    }

    .timeline-content h3 {
        font-size: 16px;
    }

    .timeline-content p {
        font-size: 13px;
    }

    .resource-nav {
        top: 60px;
    }

    .resource-section {
        padding: 80px 24px;
    }

    .resource-card {
        flex-direction: column;
        text-align: center;
    }

    .resource-card-meta {
        justify-content: center;
    }
}

/* 品牌标志：Huayu 盾形标 + 中文名 */
.logo{display:flex;align-items:center;gap:14px}
.logo img{width:auto;height:40px;object-fit:contain}
.logo .logo-name{display:inline-block;font-size:17px;font-weight:600;color:#1d1d1f;letter-spacing:.04em;padding-left:14px;border-left:1px solid #d5dde3;line-height:1.1}
.footer-brand{display:flex;align-items:center;gap:14px}
.footer-brand img{height:34px;width:auto}
@media(max-width:800px){.logo img{height:32px}.logo .logo-name{font-size:15px;padding-left:10px}}

/* Keep footer navigation labels intact when zoom narrows the layout. */
@media screen and (max-width:768px){
 .footer-nav{flex-wrap:wrap;justify-content:center;gap:12px 24px}
 .footer-nav a{flex-shrink:0;white-space:nowrap}
}

/* Legacy navigation switches before its full desktop labels stop fitting. */
@media screen and (max-width:1024px){
 .nav,.header-cta{display:none}
 .menu-toggle{display:flex}
}
/* Preserve whole footer groups and labels at intermediate and desktop widths. */
@media screen{
 .footer-container{flex-wrap:wrap;gap:20px}
 .footer-brand{flex-shrink:0;white-space:nowrap}
 .footer-nav{flex-wrap:wrap}
 .footer-nav a{flex-shrink:0;white-space:nowrap}
}